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To ALL wHoM' IT MAYooNennm Be it known that I, H. A. Henvnr, 'ot' Cleveland, in the county of Cuyahoga, and State of Ohio, have invented n new and improved Skating-Rink; und' I4 do hereby' declare that the following is a full, clear,'and exact description thereof, which will enable others skilled in the 'art to make and use the same, reference' being had to the accompanying drawing, forming :rl part oflthis specification. I

This invention relatesto a new andimproved skating-rink', and has' for its object theV constructing the same in such a mannerv thatA perfect ventilation -will be obtained, and`the water within' tho rink allowed to freeze withoutiany difliculty whatever", and kept in a frozen state, with'a moderate 1temperature of the external air, the thawing or melting of the ice, either from therays of the sun er a high'temperatnre within the rink, being avoided, when the external air in the shade is a tride above-the freezing-point.

The invention consists in constructing the rink with openings in the roof, and admitting uir into the same at it lower part, directly over the surfacewf the water, as hereinafter fully showmand described, wherebythe desired end is attained.

The accompanying drawing represents a perspective vicw of my invention, the side or end of the structure nearest the eye being removed.

A represents a building, which may .be constructed entirely offwood; that, at least, will probably be the moterialinost generally used for the purpose.. This-building may be ofany suitable d imensions acoording to the size ofthe pond it is to cover, and its roof B, which may be of double-pitch or other form, is provided with openings. a, to admit of the escape of warm air. I

Within the building or rink there is a platform, C, extending entirely or partially around it, and walled in at both sides, so as to form a cold-air trunk,-D,.which is provided, at both its inner and outer sides, with doors, I: b', nt suitable distances apart. y When b oth the inner and outer doors are open, cold air is admittedinto the rink, directly'over the surface of thepond E, which covers the space included within the coldlair trunk D. The sides of therink above the platform C may be provided with small windows or openings ,=c, for the admission of light, and they should be sufficiently high to prevent the rays ofthe sun from striking upon the pond or rink,

By this arrangement the cold'air is admitted into therink, directly over the surface of the water or ice, and the water will not only freeze readily and expeditously,bnt, when frozen, prevented from thawing or. melting readily, for the temperature within the rink-may be kept as low as that of the external air, and even lower in mild, sunny days. The warm .air escapes through the openings a, in the top ot'.l the building or roof, the direction of the current of air being shown by the' arrows.

The entrances, d, of the rink I design to have enclosed by aportico, to'prevcnt the admission of external air when the saine is at too high n. temperature. In cold weather, the doors b b', at bothl sides of the cold-air chamber ortrunl; D, may be closed, as it is designed to have the temperature within the rink as high as may be compatible with the proper preservation of the icc. v

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

A skating-rink, provided with a cold-air trunk, D, extending partially or entirely around its foundation or lower part, and provided with doors, b b', at its inner and outer sides, for the admission of external air, in connection with the openings a in the roof of the rink, all construct-ed and arranged `substantially in the manner as and for the purposes set forth.

The above specification of my inve'ntion signed by me, this 3d day of December, 1867.

' I. H. A. HERVEY. v

Witnesses :A

GEORGE ANDELSON, DAVID G. SeovILLn. 

